diff --git a/services/web/app/coffee/Features/Project/ProjectHistoryHandler.coffee b/services/web/app/coffee/Features/Project/ProjectHistoryHandler.coffee
index f2e38d5a41..ab9ec77eb5 100644
--- a/services/web/app/coffee/Features/Project/ProjectHistoryHandler.coffee
+++ b/services/web/app/coffee/Features/Project/ProjectHistoryHandler.coffee
@@ -21,6 +21,20 @@ module.exports = ProjectHistoryHandler =
 			return callback(err) if err? # n.b. getDetails returns an error if the project doesn't exist
 			callback(null, project?.overleaf?.history?.id)
 
+	upgradeHistory: (project_id, callback = (err, result) ->) ->
+		# project must have an overleaf.history.id before allowing display of new history 
+		Project.update {_id: project_id, "overleaf.history.id": {$exists:true}}, {"overleaf.history.display":true, "overleaf.history.upgradedAt": new Date()}, (err, result)->
+			return callback(err) if err?
+			# return an error if overleaf.history.id wasn't present
+			return callback(new Error("history not upgraded")) if result?.n == 0
+			callback()
+
+	downgradeHistory: (project_id, callback = (err, result) ->) ->
+		Project.update {_id: project_id, "overleaf.history.upgradedAt": {$exists:true}}, {"overleaf.history.display":false, $unset:{"overleaf.history.upgradedAt":1}}, (err, result)->
+			return callback(err) if err?
+			return callback(new Error("history not downgraded")) if result?.n == 0
+			callback()
+
 	ensureHistoryExistsForProject: (project_id, callback = (err) ->) ->
 		# We can only set a history id for a project that doesn't have one. The
 		# history id is cached in the project history service, and changing an
diff --git a/services/web/app/coffee/models/Project.coffee b/services/web/app/coffee/models/Project.coffee
index 50a39dcb7b..a63aea3609 100644
--- a/services/web/app/coffee/models/Project.coffee
+++ b/services/web/app/coffee/models/Project.coffee
@@ -72,6 +72,7 @@ ProjectSchema = new Schema
 		history         :
 			id            : { type: Number }
 			display       : { type: Boolean }
+			upgradedAt    : { type: Date }
 	collabratecUsers	: [
 		{
 			user_id						: { type: ObjectId, ref:'User' }